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    merled's Avatar
    merled Posts: 2, Reputation: 1
    New Member
    		  
    #1

    Feb 2, 2009, 08:53 AM
    Shower valve
    I have a Symmons Temptrol Model A shower valve that suddenly if I flush the toilet the water
    Gets scalding hot. Any suggestions the unit is approx 3/1/2 years old and it has always worked previously. Thanks in advance.
    Milo Dolezal's Avatar
    Milo Dolezal Posts: 7,192, Reputation: 523
    Plumbing Expert
    		  
    #2

    Feb 2, 2009, 09:15 AM

    I assume it is Single Handle shower faucet: there is an anti-scold device inside your faucet that is malfunctioning. That device is there to prevent what you are describing. You will have to close water for the whole house, remove the shower faucet cartridge and either clean it or replace it with new one.
    massplumber2008's Avatar
    massplumber2008 Posts: 12,832, Reputation: 1212
    Senior Plumbing Expert
    		  
    #3

    Feb 2, 2009, 09:27 AM
    Hi all...

    The Symmons temptrol tub or tub/shower valve only has a set screw to limit the temperature. This simply limits the rotation of the handle... nothing else.

    My guess, just like Milo's, is that the cartridge has gone bad and needs to be replaced. It is an easy fix. Shut water off to the valve, remove the trim plate, and back the large nut out and the stem unit should follow.

    This is tricky, however, as I have been installing the symmons shower valve my entire life and have never heard of this complaint... until now... ;)

    Let us know what you think here Merled.

    MARK
    merled's Avatar
    merled Posts: 2, Reputation: 1
    New Member
    		  
    #4

    Feb 3, 2009, 08:17 PM

    I will get a new cartridge and see what happens.
    Thanks everyone.
    Merled
    afaroo's Avatar
    afaroo Posts: 4,006, Reputation: 251
    Ultra Member
    		  
    #5

    Feb 3, 2009, 08:50 PM

    Hi Guys you are great I am waching the threads here from Hong Kong and read all your good advices, Thanks.

    Regards,
    John
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